The Kydland and Prescott's (1990) methodology for business cycles analysis is used to addressthe relationship between the cyclical fluctuations of the Mexican maquiladoras production andthose of other domestic and external sector variables. One of the most important results inthat maquiladoras production exhibit a different dynamics compared to that on the totalindustrial production which induce a different response to changes in the main macroeconomicvariables. On the other hand, there evidence of time and business cycle dependent effects of theUS economy on maquiladoras production fluctuations.